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workqueue: cannot queue hci_conn_timeout on wq hci2
WARNING: kernel/workqueue.c:2258 at __queue_work+0xd38/0xfb0, CPU#0: kworker/0:7/6535
Modules linked in:
CPU: 0 UID: 0 PID: 6535 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd38/0xfb0
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 33 60 9a 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 80 dc a9 8b 4c 89 fa e8 69 32 f9 ff 90 <0f> 0b 90 90 e9 1a f5 ff ff e8 9a c5 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc900029f7790 EFLAGS: 00010046
RAX: a5f3377c9c063d00 RBX: 0000000000000020 RCX: ffff888020d53a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11021e3bd38 R08: ffff88804b024293 R09: 1ffff11009604852
R10: dffffc0000000000 R11: ffffed1009604853 R12: dffffc0000000000
R13: ffff8880387d4960 R14: ffff88801a898408 R15: ffff88810f1de978
FS:  0000000000000000(0000) GS:ffff8880b83dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1159fff000 CR3: 000000003fab2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x18b/0x280
 l2cap_chan_del+0x285/0x5e0
 l2cap_chan_close+0x597/0x980
 l2cap_chan_timeout+0x158/0x390
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
